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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_DAEFunc_h) |
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25 #define octave_DAEFunc_h 1 |
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26 |
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27 #include "oct-types.h" |
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28 |
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29 class Matrix; |
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30 class ColumnVector; |
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31 |
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32 class |
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33 DAEFunc |
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34 { |
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35 public: |
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36 |
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37 typedef ColumnVector (*DAERHSFunc) (const ColumnVector& x, |
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38 const ColumnVector& xdot, |
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39 double t, octave_idx_type& ires); |
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40 |
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41 // This is really the form used by DASSL: |
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42 // |
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43 // PD = DG/DY + CJ * DG/DYPRIME |
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44 |
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45 typedef Matrix (*DAEJacFunc) (const ColumnVector& x, |
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46 const ColumnVector& xdot, |
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47 double t, double cj); |
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48 |
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49 DAEFunc (void) |
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50 : fun (0), jac (0), reset (true) { } |
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51 |
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52 DAEFunc (DAERHSFunc f) |
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53 : fun (f), jac (0), reset (true) { } |
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54 |
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55 DAEFunc (DAERHSFunc f, DAEJacFunc j) |
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56 : fun (f), jac (j), reset (true) { } |
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57 |
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58 DAEFunc (const DAEFunc& a) |
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59 : fun (a.fun), jac (a.jac), reset (a.reset) { } |
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60 |
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61 DAEFunc& operator = (const DAEFunc& a) |
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62 { |
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63 if (this != &a) |
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64 { |
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65 fun = a.fun; |
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66 jac = a.jac; |
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67 reset = a.reset; |
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68 } |
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69 return *this; |
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70 } |
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71 |
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72 ~DAEFunc (void) { } |
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73 |
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74 DAERHSFunc function (void) const { return fun; } |
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75 |
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76 DAEFunc& set_function (DAERHSFunc f) |
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77 { |
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78 fun = f; |
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79 reset = true; |
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80 return *this; |
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81 } |
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82 |
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83 DAEJacFunc jacobian_function (void) const { return jac; } |
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84 |
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85 DAEFunc& set_jacobian_function (DAEJacFunc j) |
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86 { |
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87 jac = j; |
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88 reset = true; |
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89 return *this; |
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90 } |
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91 |
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92 protected: |
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93 |
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94 DAERHSFunc fun; |
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95 DAEJacFunc jac; |
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96 |
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97 // This variable is TRUE when this object is constructed, and also |
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98 // after any internal data has changed. Derived classes may use |
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99 // this information (and change it) to know when to (re)initialize |
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100 // their own internal data related to this object. |
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101 |
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102 bool reset; |
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103 }; |
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104 |
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105 #endif |
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106 |
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107 /* |
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108 ;;; Local Variables: *** |
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109 ;;; mode: C++ *** |
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110 ;;; End: *** |
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111 */ |
